IBM Aptiva 2170 Hardware maintenance service manual - page 213
179
Mouse Port Signals
Keyboard Port Signals
Diskette Drive Cable Connector Signals
11
Busy
I
24
Ground
Power
12
Paper Empty
I
25
Ground
Power
13
Select
0
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Mouse Data
I/O
4
+5 V dc
Power
2
No
Connection
5 Mouse
Clock
I/O
3
Ground
Power
6
No Connection
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Data
I/O
4
+5 V dc
Power
2
Mouse Data
5
Clock
I/O
3
Ground
Power
Mouse Clock
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Ground
18
Direction
0
2 Density
Select
O
19
Ground
3
No Connection
20
Step
O
4
No Connection
21
Ground
5
Ground
22
Write Data
O
6
No Connection
23
Ground
7
Ground
24
Write Enable
O
8
Index
I
25
Ground
9
Ground
26
Track
0I
I
10
Motor Enable 0
O
27
Ground
11
Ground
28
Write Protect
I
12
Drive Select 1
O
29
Ground
13
Ground 30
Read
Data
I
14
Drive Select 0
O
31
Ground
Pin
Signal Name
I/O
Pin
Signal Name
I/O